The following data from GBIF covers fossil specimen occurences of the Giant Ground Sloth (Megatherium americanum - Giant Beast of America) and the largest species of Sabre-Toothed Cat (Smilodon populator). Both species would have encountered each other, as both lived mostly in South America during the Pleistocene. The Giant Ground Sloth weighed up to 4 tons and from head to tail was 6 meters long (20 ft)! Some studies believed it was also hairless because it’s large size would have made it susceptible to overheating. Smilodon populator species weighed up to 900 lbs and had a height of around 100-120cm. It was around the same height on all fours as Brown Bears.